The problem I'm having with my xfinity tv remote is that I can be watching a program and suddenly the volume begins to increase on the tv without me touching the remote. I can bring the volume back down with the remote but it fights my effort all the way back down to 0 volume and then it begins to increase again. The problem does not occur everyday but is intermittent. This has been going on for a few months now. Is the problem in the remote or possibly the box itself?